In reality, moral rules are directions for running the human machine. Every moral rule is there to prevent a breakdown, or a strain, or a friction, in the running of that machine. That is why these rules at first seem to be constantly interfering with our natural inclinations.
C. S. LewisNow repentance is no fun at all. It is something much harder than merely eating humble pie. It means unlearning all the self-conceit and self-will that we have been training ourselves into for thousands of years. It means undergoing a kind of death. In fact, it needs a good man to repent. And here's the catch. Only a bad person needs to repent: only a good person can repent perfectly. The worse you are the more you need it and the less you can do it. The only person who could do it perfectly would be a perfect person - and he would not need it.
C. S. LewisThe moment you wake up each morning, all your wishes and hopes for the day rush at you like wild animals. And the first job each morning consists in shoving it all back; in listening to that other voice, taking that other point of view, letting that other, larger, stronger, quieter life come flowing in.
C. S. LewisWhen the most important things in our life happen we quite often do not know, at the moment, what is going on. A man does not always say to himself, "hullo! i'm growing up." It is only when he looks back that he realises what has happened and recognises it as what people call "growing up.
C. S. Lewis